using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using Enu = System.Linq.Enumerable;

class Program
{
    static readonly int INF = (int)1e9, MaxN = 10000;

    void Solve()
    {
        int N = reader.Int();
        var dp = Enu.Repeat(INF, MaxN + 1).ToArray();
        dp[1] = 1;
        dp[2] = 2;
        var que = new Queue<int>();
        que.Enqueue(2);
        Predicate<int> IsInside = x => x >= 1 && x <= N;

        while (que.Count > 0)
        {
            int pos = que.Dequeue();
            int bits = BitCount(pos);
            if (pos == N) { Console.WriteLine(dp[N]); return; }
            for (int d = -1; d <= 1; d += 2)
            {
                int next = pos + d * bits;
                if (IsInside(next) && dp[pos] + 1 < dp[next])
                {
                    dp[next] = dp[pos] + 1;
                    que.Enqueue(next);
                }
            }
        }

        Console.WriteLine(-1);
    }

    int BitCount(long x) { return x == 0 ? 0 : 1 + BitCount(x & x - 1); }


    Reader reader = new Reader(Console.In);
    static void Main() { new Program().Solve(); }
}

class Reader
{
    private readonly TextReader reader;
    private readonly char[] separator = { ' ' };
    private readonly StringSplitOptions removeOp = StringSplitOptions.RemoveEmptyEntries;
    private string[] A = new string[0];
    private int i;

    public Reader(TextReader r) { reader = r; }
    public bool HasNext() { return Enqueue(); }
    public string String() { return Dequeue(); }
    public int Int() { return int.Parse(Dequeue()); }
    public long Long() { return long.Parse(Dequeue()); }
    public double Double() { return double.Parse(Dequeue()); }
    public int[] IntLine() { var s = Line(); return s == "" ? new int[0] : Array.ConvertAll(Split(s), int.Parse); }
    public int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
    public int[][] IntGrid(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
    public string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
    public string Line() { return reader.ReadLine().Trim(); }
    private string[] Split(string s) { return s.Split(separator, removeOp); }
    private bool Enqueue()
    {
        if (i < A.Length) return true;
        string line = reader.ReadLine();
        if (line == null) return false;
        if (line == "") return Enqueue();
        A = Split(line);
        i = 0;
        return true;
    }
    private string Dequeue() { Enqueue(); return A[i++]; }
}